What role does XRP on the XRPL play in all of this (below) ?
2 main roles.
1.) It acts as a fee so that there is a neural way of charging people for making transactions.
2.) It was built to be a liquidity asset. Also known as the secret sauce of the XRPLedger.
The corresponding banking system is outdated, disjointed and unjust.
There are only a few banks internationally that have international correspondence relationships with each other.
When sending money internationally, you ultimately have to go through two intermediaries banks before your money arrives at the destination.
There is minimal transparency regarding these international transactions.